William Barr, President Trump’s nominee to serve as the next U.S. attorney general, made headlines earlier this month when he pledged during his Senate confirmation hearing not to “go after” marijuana companies that comply with state laws.

Now, in response to written questions from senators, Barr is putting that pledge on paper, in black and white. He’s also calling for the approval of more legal growers of marijuana for research, and is acknowledging that a recent bill legalizing hemp has broad implications for sale of cannabis products.

“As discussed at my hearing, I do not intend to go after parties who have complied with state law in reliance on the Cole Memorandum,” he wrote, referring to Obama-era cannabis enforcement guidance that then-Attorney General Jeff Sessions rescinded last year.